Hotel-oven construction



ug H. c. MAUL HOTEL OVEN CONSTRUCTION Filed April 19. 1923 3 Sheets-$heot l me'nfoz j/e/fy Wen/ Ctro: n

Aug. 19, 1924.*

` H. c. MAUL HOTEL OVEN CONSTRUCTION 3 Sheets-Sheet 5 Filed April 19, 1923 if ug. 19, 1924.

' STATES NPATENT oFFicE.

HENRY C. MAUL, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MICHIGAN STOVE COM- PANY,'OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HOTEL-OVEN CONSTRUCTION.

Application med April 19, 1923. serial No. 633.091.

To all whom it may concern.'

Be it known that I, HENRY C. MAUL, a citizen of the United States of America, ref siding at Detroit, in the county of lVayne and tate of Michigan, have invented cer-` tain new and useful Improvements in Hotel-Oven Construction, of which the following is a specification` reference being had therein to the accompanying drawings.

The kitchens of large hotels, clubs and restauranis are often equipped with large oven structures, one oven above the other, in a unitary structure havingseparate oven compartments, burners for each oven compartment, and a door for each compartment, suoli doors being let-down or of the usual hinge type for access to the oven compartments. The doors are often opened* partially to cool off thedouble oven or" retard baking therein, andI find, after inspecting many installations, that either the'upper or lower oven is not used, generally the latter, because the manner of using the lower oven prevents perfect operation of the upper oven, and since the upper oven is more convenient, it is used in preference to the lower oven, which becomes practically useless. I find the trouble lies in the practice of opening the lower oven door, permitting heated oxygen exhausted air to escape from the lower oven right in the path of the primary air supply to the burners of the upper oven, and since warmed burned air and cold gas do not afford a proper or perfect combustion, the burners of the upper oven do not function properly-consequently poor baking. The chefs or cooks therefore' discontinue to use the lower oven in order to obtain good results with the'upper oven. I nd this defect can be remedied, so the object of this invention is to provide means to prevent the operation of one oven from interfering with the operation of an adjacent oven. To do this, I rst partition off, shield or inclose the air mixers of the upper oven burners, and second, provide an independent source of air for such burners. In partitioning olf the air mixers of the upper oven burners, I prevent any heated and burned' air, escaping or radiating from the lower ovn burners, from being drawn in or entering such air mixers, and since I provide a remote source of air for the upper oven burners, proper combustion i keepers .12 at the to Supply P1P@ partially open assured. It is therefore obvious that the lower oven can be used, simultaneously with the upper oven, as intended, without destroying or .interfering with perfect baking in the upper oven.

The construction which I employ to accomplish the above results will now be described in connection with superposed ovens and by aid of the drawings wherein Figure 1v is a front elevation of ahotel oven structure in accordance with my invention;

' Fig. 2 is a vertical longitudinal`sectional view of the same, showing the lower oven door partly open;

Fig. 3 is a perspective view of a detached sectional or two-part casing forming part of my invention;

Fig. 4 is a horizontal sectional view of the upper oven, partly brorlen away, and

Fig. 5 is a rear elevatio of a portion of the oven structure partly in vertical section.

The hotel oven structure which I have illustrated may be arranged in battery formation with other oven structures and each structure includes a lower oven 1 containing burners 2 and an apertured oven bottom 3. Above the lower oven- 1 is an upper oven 4 containing burners /"and an apertured oven bottom 6. The doorways of the ovens 1 and 4 are normally-closedby bottom hinged or pivoted let-down doors 7 and 8, the door 7 having a slidable latch member 9 to engage keepers 10 on the front wall of the oven structure, and the door 8 has a slidable latch member 11 to engage of the oven structure.

The burners 2 an 5 have air mixers 13 into which extend the jets 14 of valves 15, said valves being connected to gas supply pipes 16 andv 17 supported in brackets 18 on the front wall of the oven structure.` The gas supply pipe 16 is connected to the gas 17 and-v these gas supply pipes are provided with. pivoted supports 19 in sliding engagement with the doors 7 and 8 so that said doors maybe safely'sup in open positions or, as illustrated in ig. 2 in connection with the lower oven 1, in a position. As pointed out in the beginning, it is common practice to open the oven doors,`but partially, -to permit the ovens to cool or to regulate rted...

Thelower oven 1 receives air through the 65 and addition to the openings 35 there isa l oven is ventilated by apertured bottom 20 of the casing and said i a series of exhaust openings 21, a horizontal flue 22 and a rear vertical flue 23 to the exhaust stack or chimne??` 24 of the oven structure.

he upper oven 4 receives air through an apertured bottom wall 25 and said upper oven is ventilated b a series of exhaust openings 26 o ening mto a top flue 7 communicating with the stack or chimne 24.

Thus far l have described an oven construction which may be considered more or less conventional and of that type used in the kitchens of large hotels. 'If the door 7 of the lower oven l is opened but partially, as shown in Fig. 2, kthe heated or burned air escaping from the lower oven 1 is deflected upwardly b the door 7 in front of the air mixers 13 o the upper burners 5, and is consequently drawn into the burners to commingle with the gas supplied thereto. The

warm burned air and the cold gas do not mix well for combustion purposes, therefore pjoor combustion within the upper oven 4.l

nder such lconditions the upper oven does not bake or roast as desired and to improve this condition a chef or cook will discontinue to; use the lower oven 1, because the upperl the supply of air to the upper burners 5 from any heated air that may be emitted at the doorway of the lower oven 1. This is accomplished by two changes or additions to Y. the usual form4 of' double or superposed ovens.

First, 1 mount a sectional ortwoart casing or shield about the valves 15 and 1n front of the air mixers 13 of the upper burners 5. lThe casing, as best shown in Fi 3, comprises two oblong members 28 an 29 laced in abutting relation, the memture by stove bolts 31 or other fastening means so that the member 28 will be stationary under the valves 15 of the upper' upper edge notched or recessed, as atl 34 to receive the valve connections at the gas sup- .ply` lpipe-16, as best shown in Figs. 2 and 4.

e upper casing member 29 is detachably mounted o'n the upper edges of the casing memberJ 28 against the front wall of the oven structure and said upper casing member 2 9 is provided with openings 35 for the handles and stems 36 of the. upper valves 15,

av'ing end langes 30 adapted to be fastened to the vfront wall of the oven strucwhich due the upper pven 4 receivesl fresh air. The rear wall of the iue 39 has two openings 40 communicating with vertical lues 41 at the rear wall of the oven structure, the said vertical iiues 41 having \the lower ends thereof open at the bottom of the oven structure. By reference to Fig. 5 it will be noted' that the smoke or exhaust ue 23 has its lower end closed in a plane below the upper closed ends of the air intake flues 41, and the flue 41 merge'into a wide air intake passage at the lower part of the oven structure.

' By reference to Fig. 2 it will be noted that the lower oven door 7 may be left ajar without any danger of the heated or burned air from the oven doorway entering the casing about the upper valves 15 and consequently the4 lower oven l can be operated in the usual manner without interferin with the operation of the upper oven This upper oven will receive its air from the rear part or bottom of the oven structure and the same source of air serves the air mixers of the upper burners by reason of the casing communicatin with the forward end of the due 39. T e arrangement of the casing about the valves 15 does not interfere with the operation of said valves nor prevent adjustment of the air mixers, for the reason that. thev casing member 29 may be easilyn removed.

My invention is susceptible to such structural changes as are permissible by the appended claims.

What l claim is l. 1n an oven structure wherein superposed ovens each have a door with burners in the oven and said burners provided with air mixers and valves,'the air mixers of the i upper oven being in proximity to the doorway of the lower oven and liable to receive heated air therefrom z-means isolating the source of air for the air mixers of the up- ',per oven from that which may be emitted at the doorway of the lower oven, said means inclosing the air mixers of the upper oven and Ieiving ein at a point remote from the doorway of the lower oven.

2. An oven structure as called for in claim 1, wherein said means includes a two-part casin one part of which is detachable.

H 3. oven'structure as called for'in claim 1, wherein said means includesa casing receiving air fromv a flue betweenthe superposed ovens. v,

4. An oven structure as ca led for in claim 1, wherein said means inclu es a casing receiving air from Hues, one between the upper and-lower ovens communicating with a Hue behind the lower oven.

5. An oven struc-ture comprising upper and lower ovens, said oven structure having an exhaust Hue communicating with the top of each oven. said lower oven receivin air from the bottom of said structure, sai upper oven receiving air from behind said lower oven` burners for each oven having air inlets. and a casino' inclosing the air inlets of' the burners o? the upper loven and receiving air from behind the lower oven.

6. An oven structure as called for in claim 5. wherein the easing is composed of a stationary member serving as an air deHector, and a detachable member seated on said st-ationarj` member.

7; .iinA oven structure comprising upper and lower ovens, said oven structure having an exhaust Hue communicating with the top of each oven, said lower oven receiving'air through the bottom thereof, burners for each oven having air inlets, a valve for each burner, a, gas supply pipe connecting the burner valves of eac-h oven. and a casing inclosing `the air inlets of the upper oven burners, said casing engaging the front wall of the oven structure and extending between the burner valves and the gas supply pipe Vconnected thereto.

8. An oven structure including upper and lower ovens provided with burners, and said oven structure having a horizontal Hue between said ovens receiving air at the rear end thereof and having its front end inclosed to suppl air to the burners of the upper oven in ependentof any source of air in front of said oven structure.

9. In a double oven. one oven above the other, the loweroven having a, door opening and a door for closing the door opening, a burner in the lower oven, a, burner in the upper oven having an air mixer situated immediately above the door opening of the lower oven, and means to pre-vent the products of combustion from the lower oven burner from exerting a disturbing effeet on the air mixer of the upper oven burner when the lower oven door is open.

10. In a double oven, one oven above the other, burners for each oven, air mixers on the burners,v and a shield to prevent the products of the lower oven from interfering with the air intake of the burners of the up er oven, when lower .oven door is open.

n testimony whereof l ax my signature in presence of two witnesses.

zal NRY C. UL.

Witnesses:

Cinemas W. STAUFHGEB., 

